Dumping body



May 29', 192s.

F. BISZANTZ DUMPING BODY Filed Dec. 2.8, 1927 mM. nh

' May 29, 1928. 1,671,884

F. BlszANTz DUMP I NG BODY Filed Dec. 28, 1927 2 sheets-sheet 2 Patented May 29, 1928.

N UNITED STAT-asl PATENT DFFICE.

FEED BrszANTz, oFeALIoN, omo, AssmNoR 'ro THE NATIONAL GRAVE vAULT 00.,"01*

GaLroN, omo, A coRPoRATIoN 0F omo.`

DUMPING BODY.

,applicati-a 1aed December 2s, 1327. seeth No. 243mg This invention relates to dumping bodies produce a device of this character which ivill be automatic in both its dumpingand return movements and 1n which the prlnciple illustrated in mvprior application, S6,- i

rialNo. 226,989, filed,October 18, 1927,`for dumping bodies, of first elevating thefor- Ward end of the body Without rearward movement to ermitgthe body to clear all obstructions andJ then simultaneously elevating and longitudinally shifting the body, so `as to clear the rear end of the chassis frame as the dumping action continues, employed, ,A further and more specific object of the invention is to provide means ypositively checking the dumping operation, which also serves as a means for imparting to the body a. slight movement assisting the same in its return to the load transporting position.

Afurther object of the invention is to produce a structure of this character which may be readily and cheaply manufactured,"

.which will be durable and etlicient in service and a generalimprovement in the art.

These and other objects I attain by the .construction 'shown in the accompanying drawings, wherein `for the purpose of illustration is .shown a preferred embodiment `of my invention and wherein 1 l` Figure lis a side elevation showing a dumping body constructed in accordance .with my invention, parts being illustrated in the dumping position;

Figure 2 is an enlarged longitudinal sectional view through the frame showing tl'ie mechanism controlling the longitudinal shifting of the body;

Figure 3 is a detail sectional view shoe'- ing the manner in which the rollers of the tilting arms operate in the tracl; provided therefor;

Figure e is a detail sectional view show-` ingthe tripping mechanism employed to apply an initial impulse tothe thrust arms, po-

sitioning them to permit gravity return of the body;

Figure 5 is a detail sectional view on the line j55 ofFiglure 1; t

Figure 6 is a detail view showing the 14, the upper surfaces of `which are slightly below` the upper surfaces of the plates l2 and side members 115.l At their forward ends, `the side members are connected a transversely extending member 15 forming a. `bumper or "silL Intermediate their ends, the side members are connectediby transversely extending supports 16 upon which are arranged at the approximate centers thereof longitudinally extendin supports 17 in which are mounted the en( s of shafts 18, 19 and 20.y rlhe supports`17 have depending flanges beneath and slightly in advance of theshaft 20 Within which is journaled a rock shaft 21. The shaft 18"has mounted thereon a pinion 22 meshing with the tooth series 23 of `a mutilated geen `This mutilated `gear has a secondtooth series 24,

the ends of which are spaced from the ends of the tooth series 23 and connected thereto by refentrantly curved faces and 26, Upon the shaft 2O is mounted a segment 27 having `a tooth series 28 for coactlon Withthe tenth series 24; of `the `mutilated gear `and at opposite sides of this tooth series `28, arcuately Vcurved faces 29 and 30 for coaction Iwith the ieentraiitly curved faces `25 and 26 of `the mutilated gear. i

Upon theshaft- 2,1 is secured an arInBl having `pivotally mounted vthereon a pa`w12 spring-pressed into engagement with the periphery of the segment 27 at the curved face 30 thereof `and adapted to engage against a shoulder 313` formed at one `enel fof this face tocheck rotation of `the segment in .one direction. Immediately rearward `the transverse member 15 is disposed a transf verse rock shaft 34 having ai crank arm 35 connected byla link 36`Witl1 ,a similar crank arm 37 uppn the rock shaft 21. This rock shaft 34 a second ,crank arm `38 con- LLI nected to an operating member 39 adapted to extend to the cab of the vehicle. The rock shaft has extending upwardly therefrom a latch hook 40 and the shaft is normally` urged into operative position of the latch by a spring 41.

The numeral 42 designates a body and 43 the longitudinally extending under frame members thereof. In accordance with my invention, I secure to this body and more particularly to the frame members 43, rockers 44, the forward edges of which areI located slightly forward of the center of gravity of the body. These rockers operato above the rollers 14, bars 45 being interposed between the faces of the rockers and the rollers. The rockers 44 have projecting from their inner faces, pins 46 spaced longitudinally of the rocker edges and the bars 45 are each provided with a flange 47 notched at intervals, as at v48, for the reception of these pins, so that the bars always occupy al fixed position with relation to the peripheries of the rockers. Likewise secured to the longitudinally extending frame members of the body .are brackets 49 between which extends a shaft 50. This shaft 50 has engaged therewith adjacent the inner face of each bracket the rear end of a link 51, the forward ends of which are connected to throwback arms 52 secured to the ends of the shaft 18 outwardly of the longitudinal supports 17.

Secured to the body adjacent the forward end thereof are a pair of opposed longitudinally extending channels 53, which have their forward ends 54 spa-ced from the bottom of the body and their rear ends 55 engaged against the bottom of the body at the upper flanges thereof and between these points, incline upwardly and rearwardly toward the body, as indicated at 56. Adjacent edges of the channels are spaced from one another to provide a slot 57 permitting passage of a pair of transversely spaced arms 58. At their upper ends, these arms are maintained in separated relation by a spacer 59 mounted upon a pivot shaft 601 at the ends of which are mounted rollers 61, which are of slightly less diameter than the width of the channels and each operates in a channel 53. The lower ends of the arms 58 are mounted upon a pivot bolt 59 extending transversely through the segment 27 adjacent the periphery thereof at the curved face 29. Inwardly of the pivotbolt 5S), the segment has stop lugs 60 against which the forward edges of the arms 58 may bear. Extending rearwardly from the segment and Secured thereto is a post 61 having a spring seat62 between which and the arms a spring 63 extends. These springs normally serve to maintain the arms in engagement with the lugs and the arms in a yieldingly fixed position with relation to the segment. At its forward end, the body has a transversely extending support 64 upon which is mounted a latch catch 65 for coaction with the latch element 40. This transversely extending support also provides a mounting for a sill engaging element 67 for engagement wtih the transversely extending sill 15 to provide a support for the forward end of the body when in transporting position. A support for the rear end of the body is provided by flat portions 68 at the forward ends of the rockers whiclnwhen the body is in the horizontal position, engage 'upon the upper surfaces of the side members 11 of the frame, sothat a solid three point mounting for the body is provided at thisrtime.

The operation is as follows:

lVith the body in dumpino` position, the latch pawl 32 is engaged witi lthe shoulder 33 of the segment. At this time, the arms 58 have their rollers 61 engaged in the channels 53 adjacent the rear ends thereof and serve as a rop holding the forward end of the body m its dumpin position. If, at this time, a pull is exerte on the operating member 39, this pullv is transmitted through the rocker arm 38, shaft 34, rocker arm,35, link 36, arm 37, shaft 21 and rocker arm 31 to the pawl, shifting the pawl rearwardly and thereby causing lthe arms to oscillate forwardly. This forward movement causes a slight downward movement of the forward end of the body and the body then continues vits movement by gravity as, at this time, the center of gravity lies forward of the pivotal support of the body which is at the rear end of the rockers'44. The tilting movement continues and by this tilting movement, the segment 27' is rotated, finally bringing the tooth series 28 and 24 into engagement. y

The springs 63 serve as an absorber for the shock of such engagement. The engagement of these teeth causes a rotation of the mutilated gear with an accompanying rotation of the pinion 22. The rotation of the pinion 22 and its shaft 18 causes the throwback arms 52, which, in the dumping position extend rearwardlyand slightly downwardly from the shaft, to shift to a position where they extend forwardly and slightly downwardly from the shaft and which Yis about 185 removed from the first named position. During this movement, the links 51 are shifted forwardly and through the shaft 50 and brackets 48 shift the body forwardly. During forward movement of the body, the pins 46, by their engagement in the notches of the bars, cause the bars to travel over the rollers until they reach their extreme forward position. At this time, the toothed engagement of the'segment with the mutilated gear, discontinues and the curved portion 29 comes into coaction withV the reentrantly curved portion 25 of the mutilated gear. From this point, forward movement i the forward end ot thebody in its lowered position with the sill ,engaging elements `67 in engagement with the transverse ysill 15. At the saine time, `the fiat portions 6.8 come to iestupon the side members 11 to provide a support for thebody and all load isv taken trom the rollers 14 and the bars or carriages.

Attention is directed to the fact thatby providing the channels 53 with the angularly bent portions 56, when the bodydumps, the pull of the track is against the bot-tement the rollers 61 and accordingly the action of these rollers upon the `track Will have a tendency to assist in the rearward movement of the `body at the time the same is shifted.v

Similarly, when the body released after dumping for return to its load transporting position, the angular portion of the track bears against the top of the rollersy at the time the segment teeth start tovmesh with the teeth of the mutilated gearso` that these teeth are held firmly in engagement Without interfering With the tilt-ingr motion of the bodyandthe inertia of the body is stored by the springs `to assist in the shifting movenient oft'the body. Prior to operation of the member 39 `to cause a` shiftof the segment 27, the arms 58 are perpendicular to the angular portion 56 of the tracks With the result that a lock is provided, preventing return gravity movement unt-il the position oftliese arms disturbed. v i j It ufillbe noted that the segment in its co action with the re-entrantly curved Vfaces of the mutilated gear serves to lock this mutilated gear against rotation and `acoordingly through engageirient of the pinion 22 With the cmutilated gear to lock the throw-back ari'ns 52 against movement, so that at any time when the segment'is engaged with either one ot these faces, no longitudinal .movement oi the body cantake place. There- `iorc, in loading Aand dumping positions and during the primary and linal tilting movements ol the body when "moving from loading to dunufiing or dumping to loading posi! tions, the body is locked against longitudinal movement. llurther, since smooth faces ol the segment and gear are in opposition to one another. there will be practically no resistance to the tilting movement during Iprimary and linal tilting operations. This is important in an automatic structure of this character, in that it enables the body to gain sutiicient impetus to overcome the inertia of the body during the shifting'period. This initial shitting movement, as in my pnior'apizlication hereinbefore identilied, also serves to permit the body to clear all obstructions before the longitudinal shift takes place.

Carriages or bars moving upon the rollers `provide `aunovable base for they rocker when the body is tilting While locked against lon- 1. In a o 'avit dum )ino bodv a :traine a h h o 7 7 body supported from the frame for longitudinal shitting and tilting movements thereon, an arm having connection with theframe and the body whereby it is" oscillated as the b ody is ytilted and other operative connec! Vtions between said arm and the body Whereby the oscillation of said arm shifts the body longitudinally, said connections being inoperative to cause longitudinal shifting movement of the body until thecompletion of a primary tilting movement of the body or during final tilting movement thereof.

2. In a gravity dumping body, a frame, a

body supported from the `frame for longitu- Y dinal shitting .and tilting movements thereon` an arm having connection with the frame and the bodywlierelry it 1s oscillated as the body jis tilted and` other `operative.connec- 1 tions` between said arm and the body Whe-re` by the oscillation of said arnishifts the ,body longitudinally, said connections beingy inoperative toy cause longitudinal shifting movement ot-the body until the completion of a primary tilting movementof the body or during iinal tilting movement thereof, and locking the body against longitudinal moven'ient when inoperative to shift `the same. y y y 3. In a gravity dumping body assembly, a `ilranfie, a body` supported upon the frame for vlongitudinal shifting and tilting movements itheneongian arm having `connections with the iframe .and body whereby the arm is' oscillated as the body tillts, a shaft extending transversely ot and mounted in the iframe and .having crank arms, links connecting the crank arms and the body whereby upon rotation o'l'` the sha't't the body is shifted longi tilldinally, and interrupted gearing connect- Ving said shaft and alim 'whereby as the arm oscillates Ain response to a tiltingr movo- :ment of the `body the shaft is at -tirst stationary, is then i'jotated through a predetern'iiinedkarc and `is finally stationary said tilting movement. i y 4. In a `gravity dumlgiing body, a frame, carriages .freely longitudinally shiftably mounted thereon, a body, rockers foi the during f body upon which the `body `tilts by gravit-y `from loading to dumping and from dumping to loading positions operating upon said carriages, and 'means holdin the "bod afvainst `longitudinal shifting movement during` initial and final tilting movements while the carriages are shifted and operated by tilting of the body alone to shift the body and carriages longitudinally intermediate said initial and final tilting movements.

5. In a gravity dui'nping body, a frame,

carriages freely longitudinallyl shiftably mounted thereon, a body, rockers for the body upon which the body tilts by gravity from loading to dumping and from dumping to loading positions operating upon said earriages, means holding the body against longitudinal shifting movement during initial and linal tilting n'lovemei'its while the carriages are. shifted and operated by tilt-ing of the body alone to shift the body and carriages longitudinally' intermediate said initial and tinal tilting movements and means maintaining the carriages against longitudinal movement with relation to the rockers supported thereby. Y 6. In a gravity dumping body, a frame, carriages `freely longitudinally shiftably mounted thereon, a body, rockers for the body upon which the body tilts by gravity from loading to dumping and from dumping to loading positions operating upon said carriages, means holding the body againstlongitudinal shifting movement during initial and final tilting movements while the carriages are. shifted, and operated by tilting of the body alone to shift the body and carriages longitudinally intermediate said initial and final tilting movements and means upon said rockers engaging the frame when the body is in loading position to support the body through the rockers while holding the weight of the body and rockers from said carriages. i

7. In a gravity dumping body, a frame, carriages freely longitudinally shiftably mounted thereon, a body, rockers for the body upon which the body tilts by gravity from loading to dumping and from dumping to loading positions operating upon said carriages, means holding the body against longitudinal shifting movement during initial and final tilting movements while the carriages are shifted, and operated by tilting of the body alone to shift the body and carriages longitudinally intermediate said initial and final tilting movements, means maintaining the carriages against longitudinal movement with relation to the rockers supported thereby and means uponsaid rockers engaging the frame when thebo'dy is in loading position to support the body through the rockers while holding the weight of the body and rockers from said carriages.

8. In a. gravity dumping body, a frame, a body supported from the frame for longitudinal shifting and tilting movements thereon, an arm having connection with the frame and the body whereby it is oscillated i as the body is tilted. other operative conneet-ions between said arm and the body whereby the oscillation of said arm shifts the body longitudinally, the means supporting the body from the frame being such that the body moves automatically from loading to dumping ositions and from dumping to loading positions, said arm when the body is in the dumping position having engagement with the body and frame preventing return movement of the body, means operable to shift the arm through a short dist-ance to permit the body to move from dumping to loading positions bygravity, eoaeting latch elements upon the body and frame engaging when the body is in loading position and a single operating means for the latch element of the frame and the arm shifting means.

9. In a gravity dum ing body, a frame having at opposite si es thereof pairs of opposed supports, rollers extending between thesupports of each pair and having their upper surfaces below the upper edges thereof, a carriage bar slidable freely upon each group of rollers, a body, a rocker secured to the body for each carriage and engaging the carriage. said body tilting by gravity upon said rockers from loading to dumping and from dumping to loading positions, means holding the body against longitudinal shifting movements during initial and final tiltking movements of the body while the carriages are shifted, said means being operated by tiltmg of ,the body alone and shifting the body and carriages longitudinally intermediate said initial and final tilting movements.

10. In a gravity dumping body, a frame havingf'at opposite sides thereof pairs of opposed supports, rollers extending between the supports of eachypair and having their upper surfaces below the upper edges thereof, a carriage bar slidable freely upon each group of rollers, a. body, a rocker secured to the body for each carriage and engaging the carriage, said body tilting by gravity upon said rockers from loading to dumping and from dumping to loading positions,

means holding the body against longitudinal shifting movements during initial and final tilting movements of the body while the carriages are shifted, said means being operated by tilting of the body alone and shifting the body andcarriages longitudinally `intermediate said initial and final tilting movements, said carriages each having at corresponding sides thereof a flange, Said flange having longitudinally spaced notches, the rockers having pins for engagement in the notches of the flange to `thereby maintain the carriages in fixed relation to the peripheries of the rockers.

In testimony whereof I aix my signature.

FRED BISZANTZ. 

